Răspuns:
li:3 protoni 4 neutroni
P:15 protoni 16 neutroni
Cu:29 protoni 35 neutroni
K:19 protoni 20 neutroni
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Răspuns:
li:3 protoni 4 neutroni
P:15 protoni 16 neutroni
Cu:29 protoni 35 neutroni
K:19 protoni 20 neutroni